| Name | Hypnum exannulatum Schimper |
| Authorship | Schimper |
| Rank | Species |
| Placed in | Hypnum Hedwig |
| Citation | 1854 Bryol. Eur. 6: 110. 603 (fasc. 57–61 Mon. 34. 23.) |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Hypnum exannulatum Schimper |
| Identification made in | [no date] (2) |
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